DC/DC Power Designer software now includes simulation

November 29, 2013 // By Graham Prophet
Ericsson Power Modules has added three new simulation tools to its Power Designer software. The latest version of its DC/DC Digital Power Designer software tool has extra features that enable board power designers and system architects to simulate either simple or complex power schemes, reducing time-to-implementation and time-to-market.

A loop compensator optimises transient response, stability and capacitance optimisation; phase spreading significantly reduces current ripple, amount of filtering and board space; voltage tracking simplifies complex power setups; and an intuitive interface and system overview help speed use of the tool.

Ericsson Power Designer (version 1.4) features advanced loop compensation functionality that makes it easy to simulate output capacitors and filtering networks such as PI filters on the output of 3E (“ Enhanced Performance, Energy Management, and End-user Value”) Point-Of-Load (POL) DC/DC converters, and to optimise loop response without hardware modification for the end application.

Using the tool’s Loop Compensator, it is possible to enter values provided by system designers to optimise loop response to match specific profiles such as that required by fast transient conditions, which are often seen when powering processors that are switching from low to high traffic load. The Loop Compensator tool is based on mathematical algorithms using switched-Hamiltonian differential-equation models, adding in the results from simulation, all presented through an intuitive graphic user interface. The Loop Compensator includes: PID control optimisation, capacitance optimisation and load transient response, in addition to the ability to enter values for the power module and load capacitor, as well as the inductor to simulate a PI filter.

Processors can now draw currents in excess of 100A. In addition to this, to efficiently power these new demanding components, new power architectures based upon multiple POL converters that distribute energy to multiple points will increasingly require a move from three to six modules in parallel, with the accompanying risk of high-current interference and disturbance. Ericsson 3E digital POL converters are designed for these types of applications and are able to provide efficient current sharing, phase spreading and phase shading.

Ericsson Power Designer now includes a new tool to optimise synchronisation and phase spreading. A simulation module shows in a graphical format how the different phases are operating, the level of energy pulse